[FEAT] Added snackbar herlper and dialog helper.

lib/src/dialog/dialog_helper.astromic.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/material.dart';
+import './src/models/models.exports.dart';
+
+class AstromicDialogHelper {
+  /// Show a dialog.
+  static Future<T?> show<T>(
+    BuildContext context, {
+    required Widget contentSection,
+    Widget? stackedCloseWidget,
+    AstromicDialogConfiguration configuration = const AstromicDialogConfiguration(),
+    AstromicDialogStyle style = const AstromicDialogStyle(),
+    void Function(T?)? onClose,
+  }) async {
+    //
+    return await showDialog<T>(
+        context: context,
+        useSafeArea: configuration.safeAreaAware,
+        builder: (BuildContext _) {
+          return Container(
+            margin: style.placement,
+            //
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              children: <Widget>[
+                Row(
+                  mainAxisSize: MainAxisSize.min,
+                  children: <Widget>[
+                    Stack(
+                      children: [
+                        Container(
+                          width: (style.width ?? 0) - ((style.placement?.start ?? 0) + (style.placement?.start ?? 0)),
+                          //
+                          padding: style.contentPadding,
+                          decoration: BoxDecoration(
+                            color: style.backgroundColor,
+                            borderRadius: style.radius,
+                          ),
+                          child: contentSection,
+                        ),
+                        if (stackedCloseWidget != null)
+                          Positioned.directional(
+                            textDirection: style.textDirection,
+                            start: style.closeWidgetPlacement?.start,
+                            end: style.closeWidgetPlacement?.end,
+                            top: style.closeWidgetPlacement?.top,
+                            //
+                            child: stackedCloseWidget,
+                          ),
+                      ],
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          );
+        });
+    //
+  }
+}